summary prettified

[rozyczko]

This pull request introduces improvements to how fit results are propagated and displayed, as well as a user interface enhancement for experiment name tooltips. The most significant change is ensuring that fit results are accessible at the project level for summary calculations. Additionally, the UI now provides tooltips for truncated experiment datablock names, and there are minor corrections to variable names and dependencies.

Fit results propagation and summary accuracy:

• Fit results are now stored in the project object (_project_lib._last_fit_results), making them accessible for summary calculations such as chi-squared and errors.
• The code now correctly uses reduced_chi2 instead of reduced_chi to calculate and return the reduced chi-squared value for fits, ensuring accuracy in summary statistics.

User interface enhancements:

• Added a tooltip mechanism in Summary.qml that displays the full experiment datablock name when the user hovers over a truncated name, improving usability for long names.

Dependency update:

• Updated the easyreflectometry dependency to a specific Git branch (summary_update_1) to incorporate recent library changes.